See:
Cherry (Prunus spp.) - Nematode, Dagger
Cherry (Prunus spp.) - Nematode, Root-lesion
Notes: There have been many nematode problems associated with peach production around the world. There are many nematode problems in the Pacific Northwest including root lesion, dagger and root knot nematodes. However, there has not been any published or concentrated effort to document nematode problems in peach orchards in eastern Washington or western Oregon. Few samples from peach orchards have come into the OSU Nematode Laboratory. It is suspected that nematodes are a problem that simply has not been investigated. In one case in western Oregon, nematodes were associated with a non-vigorous patch of problem trees in one orchard. Trees were said to have benefited from an application of fenamiphos (a material no longer available). As in cherry, ring nematodes can increase the susceptibility of peach trees to bacterial canker but it has not been studied in the PNW.
References Khanal, C., Harshman, D. and Giles, C. 2022. On-farm Evaluations of Non-fumigant Nematicides on Nematode Communities of Peach. Phytopathology. 112:2218-2223.